package com.heima.media.controller;

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.read.listener.ReadListener;
import com.alibaba.excel.util.MapUtils;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.heima.common.dto.ResponseResult;
import com.heima.media.entity.WmSensitive;
import com.heima.media.service.IWmSensitiveService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.Date;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/text")
public class TextController {
    @Autowired
    private IWmSensitiveService sensitiveService;

    /**
     * 读取excel数据
     * @param file
     * @return
     * @throws IOException
     */
    @PostMapping("/read")
    public ResponseResult readExcel(MultipartFile file) throws IOException {
        EasyExcel.read(file.getInputStream(), WmSensitive.class, new ReadListener<WmSensitive>() {
            @Override //每读取一行
            public void invoke(WmSensitive wmSensitive, AnalysisContext context) {
                //更新到数据库
                //查询数据库有无这个词
                LambdaQueryWrapper<WmSensitive> query = new LambdaQueryWrapper<>();
                query.eq(WmSensitive::getSensitives,wmSensitive.getSensitives());
                WmSensitive one = sensitiveService.getOne(query);
                if (StringUtils.isEmpty(one)) {
                    //保存到数据库
                    wmSensitive.setId(null);
                    wmSensitive.setCreatedTime(new Date());
                    sensitiveService.save(wmSensitive);
                }
            }

            @Override //读取完毕
            public void doAfterAllAnalysed(AnalysisContext context) {
                System.out.println("excel导入数据完毕!!!");
            }
        }).sheet().doRead();

        return ResponseResult.okResult();
    }


    /**
     * 文件下载并且失败的时候返回json（默认失败了会返回一个有部分数据的Excel）
     *
     * @since 2.1.1
     */
    @GetMapping("downloadFailedUsingJson")
    public void downloadFailedUsingJson(HttpServletResponse response) throws IOException {
        // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman
        try {
            //int i = 1/0;
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setCharacterEncoding("utf-8");
            // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
            String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20");
            response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
            // 这里需要设置不关闭流
            EasyExcel.write(response.getOutputStream(), WmSensitive.class).autoCloseStream(Boolean.FALSE).sheet("模板")
                    .doWrite(data());
        } catch (Exception e) {
            // 重置response
            response.reset();
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            Map<String, String> map = MapUtils.newHashMap();
            map.put("status", "failure");
            map.put("message", "下载文件失败" + e.getMessage());
            response.getWriter().println(JSON.toJSONString(map));
        }
    }

    /**
     * 读取数据库数据
     * @return
     */
    private List<WmSensitive> data() {
        List<WmSensitive> list = sensitiveService.list();
        return list;
    }
}
